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Effect of a transverse magnetic field on solidification structure in directionally solidified Al–40 wt% Cu alloys

Published online by Cambridge University Press:  11 January 2016

Hanxiao Li ,
Dafan Du ,
Annie Gagnoud ,
Yves Fautrelle ,
Rene Moreau  and
Xi Li
Hanxiao Li
Affiliation:
State Key Laboratory Advanced Special Steel, Shanghai University, Shanghai 200072, People's Republic of China
Dafan Du
Affiliation:
State Key Laboratory Advanced Special Steel, Shanghai University, Shanghai 200072, People's Republic of China
Annie Gagnoud
Affiliation:
SIMAP-EPM-Madylam/G-INP/CNRS, PHELMA, 38402 St Martin d’Heres Cedex, France
Yves Fautrelle
Affiliation:
SIMAP-EPM-Madylam/G-INP/CNRS, PHELMA, 38402 St Martin d’Heres Cedex, France
Rene Moreau
Affiliation:
SIMAP-EPM-Madylam/G-INP/CNRS, PHELMA, 38402 St Martin d’Heres Cedex, France
Xi Li*
Affiliation:
State Key Laboratory Advanced Special Steel, Shanghai University, Shanghai 200072, People's Republic of China; and SIMAP-EPM-Madylam/G-INP/CNRS, PHELMA, 38402 St Martin d’Heres Cedex, France
*
a) Address all correspondence to this author. e-mail: lx_net@sina.com
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Abstract

Effect of a transverse magnetic field on macrosegregation and growth of primary Al2Cu dendrites in directionally solidified Al–40 wt% Cu alloys was investigated experimentally. The experimental results indicated that the magnetic field caused the formation of channel-like and freckle segregations. It was also found that the application of the magnetic field benefited the growth of primary Al2Cu dendrites and the axial segregation. Moreover, the magnetic field decreased the primary dendrite spacing and the mushy zone length; however these effects weakened with the increase of the magnetic field intensity. The above experimental results should be attributed to the formation of the thermoelectric magnetic convection during directional solidification under the transverse magnetic field.

Keywords

directionally solidificationmicrostructurethermoelectric
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 2 , 28 January 2016 , pp. 213 - 221
Copyright
Copyright © Materials Research Society 2016 

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References

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